An Overview of Cloud Based Content Delivery Networks: Research Dimensions and State-of-the-Art - Transactions on Large-Scale-Data-and Knowledge-Centered Systems XX - page 156

7 Conclusion

Cloud-based CDNs have gained signi cant importance due to the wide-spread avail-

ability and adoption of cloud computing platforms. The integration of Cloud and CDN
has mutual bene ciently and effectively distributed in the

Internet using a pay-as-you-go model promoting the content-as-a-service model. We
identi

ts allowing content to be ef

ed the key challenges and research dimensions that need to be addressed in the
cloud-based CDN space. We have presented a state-of-the-art survey on existing
commercial and academic cloud CDN solutions. Finally, we provided a comprehensive
analysis of commercial and academic cloud CDNs against the service they offer and the
research dimensions identi

ed in this paper.

ndings show that current cloud CDN providers are mostly based on one cloud
platform and lacks support for the emerging form of content distribution namely
dynamic user-generated content. Since, the solutions are based on a single cloud
providers, the services lack consideration for cost models when taking advantage of
cloud content storage spaning multiple cloud providers. Further, most commercial and
few academic solutions do not support personalisation at user level. We believe, the
future of CCDN will be based around the need to support user created content and
ability to support hybrid cloud platforms and addressing the challenges such as QoS,
SLA, costing introduced by hybrid clouds.

Our

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